mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 08:23:34 +01:00
153 lines
4.2 KiB
Go
153 lines
4.2 KiB
Go
package graphite
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import (
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"net"
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"runtime"
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"strings"
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"sync"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/netutil"
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"github.com/VictoriaMetrics/metrics"
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)
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var (
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writeRequestsTCP = metrics.NewCounter(`vm_graphite_requests_total{name="write", net="tcp"}`)
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writeErrorsTCP = metrics.NewCounter(`vm_graphite_request_errors_total{name="write", net="tcp"}`)
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writeRequestsUDP = metrics.NewCounter(`vm_graphite_requests_total{name="write", net="udp"}`)
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writeErrorsUDP = metrics.NewCounter(`vm_graphite_request_errors_total{name="write", net="udp"}`)
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)
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// Server accepts Graphite plaintext lines over TCP and UDP.
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type Server struct {
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addr string
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lnTCP net.Listener
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lnUDP net.PacketConn
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wg sync.WaitGroup
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}
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// MustStart starts graphite server on the given addr.
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//
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// MustStop must be called on the returned server when it is no longer needed.
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func MustStart(addr string) *Server {
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logger.Infof("starting TCP Graphite server at %q", addr)
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lnTCP, err := netutil.NewTCPListener("graphite", addr)
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if err != nil {
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logger.Fatalf("cannot start TCP Graphite server at %q: %s", addr, err)
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}
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logger.Infof("starting UDP Graphite server at %q", addr)
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lnUDP, err := net.ListenPacket("udp4", addr)
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if err != nil {
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logger.Fatalf("cannot start UDP Graphite server at %q: %s", addr, err)
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}
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s := &Server{
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addr: addr,
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lnTCP: lnTCP,
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lnUDP: lnUDP,
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}
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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serveTCP(lnTCP)
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logger.Infof("stopped TCP Graphite server at %q", addr)
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}()
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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serveUDP(lnUDP)
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logger.Infof("stopped UDP Graphite server at %q", addr)
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}()
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return s
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}
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// MustStop stops the server.
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func (s *Server) MustStop() {
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logger.Infof("stopping TCP Graphite server at %q...", s.addr)
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if err := s.lnTCP.Close(); err != nil {
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logger.Errorf("cannot close TCP Graphite server: %s", err)
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}
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logger.Infof("stopping UDP Graphite server at %q...", s.addr)
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if err := s.lnUDP.Close(); err != nil {
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logger.Errorf("cannot close UDP Graphite server: %s", err)
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}
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s.wg.Wait()
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logger.Infof("TCP and UDP Graphite servers at %q have been stopped", s.addr)
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}
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func serveTCP(ln net.Listener) {
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for {
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c, err := ln.Accept()
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if err != nil {
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if ne, ok := err.(net.Error); ok {
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if ne.Temporary() {
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logger.Errorf("graphite: temporary error when listening for TCP addr %q: %s", ln.Addr(), err)
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time.Sleep(time.Second)
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continue
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}
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if strings.Contains(err.Error(), "use of closed network connection") {
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break
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}
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logger.Fatalf("unrecoverable error when accepting TCP Graphite connections: %s", err)
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}
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logger.Fatalf("unexpected error when accepting TCP Graphite connections: %s", err)
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}
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go func() {
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writeRequestsTCP.Inc()
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var at auth.Token // TODO: properly initialize auth token
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if err := insertHandler(&at, c); err != nil {
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writeErrorsTCP.Inc()
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logger.Errorf("error in TCP Graphite conn %q<->%q: %s", c.LocalAddr(), c.RemoteAddr(), err)
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}
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_ = c.Close()
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}()
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}
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}
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func serveUDP(ln net.PacketConn) {
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gomaxprocs := runtime.GOMAXPROCS(-1)
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var wg sync.WaitGroup
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for i := 0; i < gomaxprocs; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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var bb bytesutil.ByteBuffer
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bb.B = bytesutil.Resize(bb.B, 64*1024)
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var at auth.Token // TODO: properly initialize auth token
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for {
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bb.Reset()
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bb.B = bb.B[:cap(bb.B)]
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n, addr, err := ln.ReadFrom(bb.B)
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if err != nil {
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writeErrorsUDP.Inc()
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if ne, ok := err.(net.Error); ok {
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if ne.Temporary() {
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logger.Errorf("graphite: temporary error when listening for UDP addr %q: %s", ln.LocalAddr(), err)
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time.Sleep(time.Second)
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continue
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}
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if strings.Contains(err.Error(), "use of closed network connection") {
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break
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}
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}
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logger.Errorf("cannot read Graphite UDP data: %s", err)
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continue
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}
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bb.B = bb.B[:n]
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writeRequestsUDP.Inc()
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if err := insertHandler(&at, bb.NewReader()); err != nil {
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writeErrorsUDP.Inc()
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logger.Errorf("error in UDP Graphite conn %q<->%q: %s", ln.LocalAddr(), addr, err)
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continue
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}
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}
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}()
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}
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wg.Wait()
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}
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